From a7e4c1a14ce2ef769c5332e8b77eafb40c1a8844 Mon Sep 17 00:00:00 2001
From: zorkow <volker.sorge@gmail.com>
Date: Tue, 1 Sep 2015 21:05:49 +0100
Subject: [PATCH] Adds final submenu closing and opening on left/right key.

---
 unpacked/extensions/MathMenu.js | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/unpacked/extensions/MathMenu.js b/unpacked/extensions/MathMenu.js
index fbdeed848..4531b814e 100644
--- a/unpacked/extensions/MathMenu.js
+++ b/unpacked/extensions/MathMenu.js
@@ -731,12 +731,13 @@
     },
     MoveHorizontal: function(event, item, move, rtl) {
       var menuNode = ITEM.GetMenuNode(item);
-      if (menuNode.menuItem === MENU.menu) {
-        if (!event.shiftKey) { return; }
+      if (menuNode.menuItem === MENU.menu && event.shiftKey) {
         move(event, item);
       }
       if (rtl) { return; }
-      this.Deactivate(item);
+      if (menuNode.menuItem !== MENU.menu && event.shiftKey) {
+        this.Deactivate(item);
+      }
       var parentNodes = menuNode.previousSibling.childNodes;
       var length = parentNodes.length;
       while (length--) {
@@ -875,6 +876,10 @@
       if (this.disabled) {
         return;
       }
+      if (!this.submenu.posted) {
+        this.Activate(event, menu);
+        return;
+      }
       var submenuNodes = ITEM.GetMenuNode(menu).nextSibling.childNodes;
       if (submenuNodes.length > 0) {
         this.submenu.items[0].Activate(event, submenuNodes[0]);